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use web_sys::WebGl2RenderingContext as WebGl2;
use wasm_bindgen::JsCast;
use crate::webhogg_exception::WebhoggException;
use web_sys::OffscreenCanvas as ECanvas;
pub struct Canvas {
ctx: WebGl2,
}
impl Canvas {
pub fn from_existing(canvas: &ECanvas) -> Result<Self, WebhoggException> {
info!("messages lol");
let ctx = canvas.get_context("webgl2")
.map_err(|x| WebhoggException::WebGlContextError(
format!("obtained invalid webgl2 context js value: {:?}", x)))?
.ok_or(WebhoggException::WebGlContextError(
"could not obtaine webgl2 context".to_string()))?
.dyn_into::<WebGl2>()
.map_err(|_| WebhoggException::WebGlContextError(
"obtained invalid webgl2 context js object".to_string()))?;
info!("successfully obtained webgl2 context");
ctx.clear_color(0.6, 0.0, 0.6, 1.0);
ctx.clear(WebGl2::COLOR_BUFFER_BIT);
Ok(Self {
ctx,
})
}
pub fn gl<'a>(&'a self) -> &'a WebGl2 {
&self.ctx
}
pub fn gl_mut<'a>(&'a mut self) -> &'a mut WebGl2 {
&mut self.ctx
}
}
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